Method and apparatus for broadcasting position location data...

Details Method and apparatus for broadcasting position location data... Method and apparatus for broadcasting position location data...

2005-05-17

2005-05-17

Trost, William (Department: 2683)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S414100, C455S414200, C455S456300, C342S357490, C342S357490

Reexamination Certificate

active

06895249

ABSTRACT:
Techniques to efficiently broadcast position location data (PLD) from a base station to a number of terminals. In one aspect, PLD messages are classified into groups, and each group is broadcast in a different manner. For example, a first group of messages for PLD related to the base station is broadcast in an unscheduled format, and a second group of messages for PLD related to GPS satellites is broadcast in a scheduled format. In another aspect, a schedule for the second group describes the specific PLD elements selected for broadcast, their broadcast order, and the specific time intervals of their broadcast. The schedule is valid for a particular scheduled time interval, and the scheduling table is broadcast multiple times during the scheduled time interval to allow the terminals to quickly retrieve the schedule and ascertain what PLD information is being broadcast and where to look for specific PLD elements.

REFERENCES:
patent: 4987571 (1991-01-01), Haymond et al.
patent: 5878033 (1999-03-01), Mouly
patent: 6246336 (2001-06-01), Hymel
patent: 6252543 (2001-06-01), Camp
patent: 6505052 (2003-01-01), Jou
patent: 6600917 (2003-07-01), Maupin
patent: 6606502 (2003-08-01), Chung Kam Chung et al.
TIA/EIA Standard “Position determination service standard for dual mode spread spectrum systems” 11-99, pps 1-131.

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